Clamp-insulator.



E3, PGLLUOK 52 W. E. WERE APPLICATION FILED MAY 9, 196?.

of the clamping members are each threaded so as to I ug members 13 are bearing boxes H of semi UNITED srrn r ns PATENT OFFICE.

GEORGE POLLOCK AND WILLIAM E. WEED, OF DEER LODGE, MONTANA, ASSIGNORS OF ONE- THIRD TO SIDNEY O. HOUK, OI" DEER LODGE, MONTANA.

CLAMPJNSULA'IOR.

Specification of Letters Patent Patented Oct. 22, 1907.

To all whom it may concern:

Be it known that we, G'soncn PQLLQCK and WIL- LIAM E. WERD, both citizens of the United States, and

residents of Deer Lodge, in the county of Powell and State of Montana, have invented a new and Improved Clamp-Insulator, of which the following is a full, clear, and exact description.

Our invention relates to insulators, our more par ticular object being to provide a type of insulator made in halves and adapted to exert leverage upon a wire, so as to grip it tightly in position as well as to insulate it thoroughly from surrounding parts, amLalso'to protect it within certain limits from the effects of moisture.

Our insulator may be made in various forms, some of which are herein shown.

Reference is to be had to the accompanying draw-F ings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a frontclevation of a post showing various ways whereby our insulator may be mounted thereupon so as to support wires; Fig. 2 is 11.11. enlarged elevation, partly in section, showing two of our insulators secured in the some plate; Fig, 3 is an elevation, partly in sec tiou, of another form of the clamp used as an insulator pin, and showing the arrangement of, the bearings for gripping the wire and thc cap for protecting a portion of the wire from the effects of moisture; l 4 is 2. plan View of a plate used for holding .hree of our improved insulators; and Fig. 5 is a fragmentary vertical section upon the line 5-5 of Fig.4, looking in the direction oi the arrow, and showing the obliquely disposed walls for retaining the supporting block.

A post 6 is provided with plates 7, 8 scoured THU) by bolts 9, 10. Ptcmovably titted within the plate 7 is a block 1] which we denomiuatc as a supporting block. The shape of this block can be seen irom Fig. In the plates 8 the supporting bl c are hown at 12 and have a conformity slightly dii lug from thatof the supporting block 11. Clamping members 1 .11";- orranged in pairs, each pair constituting in site" body of our insulator pin. Fitted within. th e c iorni, upon which the clamping members Barns :lnptcd to exert pressure. The clamping members 15 differ slightly in design from the clamping members l8. wire isshown at M) and is gripped tightly. between the two scmi-cylindriml bearing boxes l4. Al :w cap 17 is provided with a hood 18 and threaded internally as ;-'ho \vu in Fig. 2. In all instances the upper ,cnds

be fitted with the screw cap.

In the form shown in Fig. 2 the plate 19 is adapted to accommodate two insulators. For this purpose it is provided with raised walls 2i) inclined toward each other and is secured in position by aid of bolts 21.

The clamping members 22 are pairedtogether as above explained and are fitted with'semi-cylindrical bearing boxes 23 also paired, and arranged to grip the wire 16. The semi-cylindrical bearing boxes 23 are provided with flanges 23" for the purpose of preventing removal of the bearing boxes.

The clamping members 22 are provided with ends 24 turned outwardly or slightly hooked, as indicated in Figv 2. These clamping members are further provided with shoulders 25 for affording a slight spaceor crack 26 intermediate the clamping members. They are 'threadedjat 27 for the purpose or" iece iving upon their outer ends the screw cap 17. The general construction of all the details will be apparent by reference to Fig. 2.

In assembling, one of the clamping members 22 is inserted within the block 11, the other is next partially inserted therein, the bearing boxes 23 are placed in position upon opposite sides of the wire 16, and finally the clamping members are brought as nearly'together as possible so that the bearing boxes grip the wire. The screw cap l7 next secured in position, so as to increase the pressure upon the wire and thus prevent any relative movcmehtas between the wire and the clamping members. I l

in the form shown in Fig. 3 theplate 28 is provided with bolts 29, whereby it is secured in position, and is further proyid ed with a projecting portion 30 having an aperture 31 therein. Clamping members 33 are ends 32 which fit into the aperture 31.

thread 3 upon which is fitted the cap 17 provided with a hood 18, substantially as above explained with rcicrcnce to the other figures. in; boxes 35 are provided with rotund portions 36, the roturwiity oi the latter bcin concentric with that of the wire 16. The purpose of the rotund portions 36 is to prevent any possibility of the bearing boxes slipping relatively to the clamping members 83.

In Fig. i is shown a plate 37 provided with screw holes 38 and h inclined walls 39 encoinpa ng apertures it. ihe purpose oi'this pl; 37 is to hold three insulators oi any of the kinds above described.

When the screw cap 1'7 .is in position, the hood 18 projects outwardly a little distance, and tends to serve us a shield for preventing the entrance of moisture into the body of the insulator at a point where it might otherwise cause leakage of current from the wire.

It will be noted that owing to the abrupt taper of the threaded portions 27, 34 one size of insulator may be used for different size wires. The clamps, bases and caps may be made of any suitable metal or. of porcelain or wood.

Semi'cylindric'al bcarholding the same to; thr-r.

We do not limit ourselveg to the construetion shown 1 as reasonable variations may be made therefrom with out departing from the spirit of our invention Having thus describettour invention We claim as new and desire to secure by Letters Patent:

.1. The rmnbinaiion or a block prdvided with an aperture, a pair of (clamping inenihers provided with hooked ends extending into said aperture, bearing; members mounted upon said clamping, members and adapted to engage a wire and means for holding iogelher said elainpin members so as to (muse the same to grip maid wire.

2 The combination oi a supporiinya' hlnek provided with an aperture. .1 pair of (clamping membeiw; llliiiili together and lifted into said aperture. hearing members mounted upon said clamping memlu and adapted to en;- gi: a wire. and a member engaging both of said clamping members for Ti. The combination 0! n supporting i)ltl('i\' rlalnpiny: members made in pairs and provided with shoulders i'or a wir and a cap en. tlie'preasure upon s:

spacing: said Yil( l1ii)t'i'$ slightly apart. and being" l'urther provided with means for engaging a Wire, and a cap em:- 5 i113; said clamping members for the purpose of cans same to grip said wire.

4. The roinhination at a supporting blOrk, provided with an api n'tnre. clamping members made in 1",; rs and provided with hooked ends e. :iendin;, into said aperture, means mounted upon aid clamping; members for engaging cling said members for, increasing "(1 \i'i e.

5. The combination 01 a pair of clamping members disposed upon opposiie sides of a wire to be supported, and a rap engaging said clamping; lnemhers and provided with a hood i'or prote ltliesaine from moisture.

In it timony whereof we have signed our names to this specification in the presezil'rol' taro subscribing; witnesses. 

